Question

The figure shows variation of $R,X_L$  𝑎𝑛𝑑  $X_C$ with frequency $f$ in a series $L,C,R$ circuit. Then for what frequency point, the circuit is inductive?

• A. All points
• B. $B$
• C. $C$
• D. $A$

Answer 1

The correct option is C $C$


The resonance is a circuit is achieved where the inductive reactance and capacitive reactance are equal i.e.
$X_L=X_C$
From the given figure it is clear that the Resonance condition is satisfied at point $B$.

For frequencies below point $B$;
$X_C>X_L$
and for frequencies above point $B$;
$X_L>X_C$
Now, since frequency at point $C$ is greater than frequency at point $B$
At point $C$, the circuit is inductive.
Hence, option $\left(C\right)$ is correct.